## Definitions

• Webster's Revised Unabridged Dictionary
• Quadrantal (Rom. Antiq) A cubical vessel containing a Roman cubic foot, each side being a Roman square foot; -- used as a measure.
• a Quadrantal (Geom) Of or pertaining to a quadrant; also, included in the fourth part of a circle; as, quadrantal space.
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Century Dictionary and Cyclopedia
• quadrantal Pertaining to a quadrant; included in the fourth part of a circle: as, a quadrantal space.
• n quadrantal A liquid measure used by the Romans, equivalent to the amphora.
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Chambers's Twentieth Century Dictionary
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## Etymology

Webster's Revised Unabridged Dictionary
L. quadrantalis, containing the fourth fourth part of a measure
Chambers's Twentieth Century Dictionary

## Usage

### In literature:

Having placed the chart and quadrant with the almanack in what was now my cabin, I locked the door, and returned on deck.
"Paddy Finn" by W. H. G. Kingston
It struck the mate on the temple, who, falling, let his own quadrant go, and both were broken to pieces.
"Peter Trawl" by W. H. G. Kingston
I brought up my old quadrant out of the starboard wing, where I was adjusting it when the alarm was given.
"Frank Mildmay" by Captain Frederick Marryat
Quadrants and sextants were the invention of a much later period.
"The Phantom Ship" by Frederick Marryat
Stanley drew forth his quadrant and compass, wherewith he guided the party towards their future home.
"Ungava" by R.M. Ballantyne
The cap'n sent him for charts and quadrants, and suchlike cooriosities.
"The Red Eric" by R.M. Ballantyne
It is in use on all the ships at the present time, but it has been greatly improved, and is now called the quadrant.
"Discoverers and Explorers" by Edward R. Shaw
In the Western Quadrant will be found an exhibition of waxworks that would have filled poor Artemus Ward's heart with joy.
"Little Folks" by Various
A quadrant of a meridian is the quarter of a meridian, extending from the equator to either pole.
"Asiatic Breezes" by Oliver Optic
"The Sailor's Word-Book" by William Henry Smyth
An evening twilight sight of three or four stars, preferably one in each quadrant.
"Lectures in Navigation" by Ernest Gallaudet Draper
"A Fine Fix" by R. C. Noll
The figures marked on the quadrant give the latitude of the ship at the moment of meridian.
"Foot-prints of Travel" by Maturin M. Ballou
The quadrants may again be divided and subdivided, and marked by pencil or with strings.
"Philippine Mats" by Hugo H. Miller
Each quadrant was divided into three rows, marked with spaces for moving pieces.
"The Moghul" by Thomas Hoover
In one state-room was a set of gold studs and sleeve-buttons and a new quadrant.
"A Runaway Brig;" by James Otis
The earliest quadrants were traced at the foot of these columns.
"Lectures on the Origin and Growth of Religion as Illustrated by the Native Religions of Mexico and Peru" by Albert Réville
The opposite quadrants are connected together by thin platinum wires.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2" by Various
I had, according to custom, left the casement slightly ajar, the frame being secured by an iron quadrant.
"The Quest of the 'Golden Hope'" by Percy F. Westerman
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### In poetry:

"Oh, and if the quadrant has lost a hand,
And the sextant falls so low,
It's our bodies and bones to Davy Jones
This night are bound to go!"
"A Sailor's Yarn" by James Jeffrey Roche
"Oh, what does the quadrant indicate,
And how does the sextant stand?"
"Oh, the sextant's down to the freezing point,
And the quadrant's lost a hand!"
"A Sailor's Yarn" by James Jeffrey Roche
No farther tides . . . High in the azure steeps
Monody shall not wake the mariner.
This fabulous shadow only the sea keeps.
"At Melville's Tomb" by Harold Hart Crane
The greatest for its greatness is half known,
As in that world of Nature all outgrown
Where Calaveras lifts his awful pines,
And cast from Mariposa's mountain-wall
"Shakespeare" by Oliver Wendell Holmes

### In news:

A mysterious disease that has been killing the best looking, reddest strains of McIntosh apples in the nicest orchards in the northwest quadrant of Michigan has tentatively been identified, and growers now have some idea what to do about it.
My name is Nancy Sandler, we live in the N/E quadrant of Coit & Legacy.
Quadrant's Emergency Medicine celebrates 40th anniversary.
Quadrant HealthCom's Emergency Medicine is celebrating the 40th anniversary of its publication with new content and a new design.
Around 50 Unite union members manned picket lines at Swansea's Quadrant bus station and First.
Welcome To The Cloud's Magic Quadrant .
Gartner Inc has released its Magic Quadrant reports for 2012.
The Decision Makers Guide to Research Communities (Reality Quadrant ).
Gartner's Magic Quadrant for Social CRM and the Social Enterprise.
Gartner recently posted their Magic Quadrant for Unified Communications along with their analysis of the UC market.
In the latest "Magic Quadrant for WAN Optimization Controllers," Gartner states that the market is maturing, but it still sees a high level of innovation around cloud, video, multipoint quality of service, and security.
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### In science:

In the ﬁrst quadrant its boundary is given by the curve e−x + e−y = 1, which can also be represented as y = − log(1 − e−x ).
How to compute $\sum 1/n^2$ by solving triangles
More precisely, one observes that a square with side length 1/n has the same area as the part in the ﬁrst quadrant lying under the exponential curve y = e−nx/n, see Fig. 5.
How to compute $\sum 1/n^2$ by solving triangles
Indeed the space of parameters of the theory becomes the two dimensional quadrant λ≥0, M 2≥0 instead of the original positive real line.
Quantum Equivalence of NC and YM Gauge Theories in 2 D and Matrix Theory
Passage-time moments for nonnegative stochastic processes and an application to reﬂected random walks in a quadrant.
A MARKOV chain model of a polling system with parameter regeneration
There exists K ∈ Z such that for all k > K , both [αk ], [βk ] are in the positive quadrant of R2 .
Multiplicities of simple closed geodesics and hypersurfaces in Teichm\"uller space
In (4), T0,2s is the famous Catalan number, counting the number of possible tra jectories of a simple random walk of length 2s in the positive quadrant that return to the origin.
Wigner random matrices with non-symmetrically distributed entries
There is a local contribution Zv (x) deﬁned according to which quadrant x assigns to v , and the type of v (i.e., whether it is singular, positive, or negative).
Floer homology and singular knots
However, the four quadrants around a singular point v do not play equal roles.
Floer homology and singular knots
There are two quadrants, the side quadrants which correspond to regions which used to contain the thick edge in their boundary, which we denote Av and Cv .
Floer homology and singular knots
There are two remaing quadrants: the top quadrant Bv , which is pointed towards by the thick edge, and the bottom quadrant Dv .
Floer homology and singular knots
We deﬁne four quadrants Av , Bv , Cv , and Dv at the ordinary crossings analogously.
Floer homology and singular knots
Let βv be the corresponding internal β circle, and write βA , βB , βC , and βD be the four β -circles corresponding to the four quadrants meeting at v .
Floer homology and singular knots
The set Sδ,ε (right) for the closed quadrant S (left).
Approximation of definable sets by compact families, and upper bounds on homotopy and homology
This gives rise to a ﬁrst quadrant spectral sequence converg ing to H∗D .
Homology of coloured posets: a generalisation of Khovanov's cube construction
These bulge ﬁelds are designated “cgxxxqq where “xxx ” is the number of the ﬁeld and “qq ” is the quadrant of a CCD.
R Coronae Borealis stars in the Galactic Bulge discovered by EROS-2
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